Fransiy
87
Fr
Guruh
1
Davr
7
Blok
s
Protonlar
Elektronlar
Neytronlar
87
87
136
Umumiy xususiyatlar
Atom raqami
87
Atom massasi
[223]
Mass raqami
223
Turkum
Ishqoriy metallar
Ranggi
Kumush
Radioaktivlik
Ha
Francium was named after France
Kristall tuzilma
Nomaʼlum
Tarix
Francium was discovered in 1939 by Marguerite Perey of the Curie Institute in Paris, France.
It was discovered when she was researching the radioactive decay of actinium-227.
Marguerite Perey discovered that francium-223 is made naturally when actinium-227 emits an alpha-particle.
It was discovered when she was researching the radioactive decay of actinium-227.
Marguerite Perey discovered that francium-223 is made naturally when actinium-227 emits an alpha-particle.
Qobiqdagi elektronlar soni
2, 8, 18, 32, 18, 8, 1
Elektron konfiguratsiyasi
[Rn] 7s1
Francium was the last element discovered in nature, rather than by synthesis
Jismoniy xususiyatlar
Faza
Qattiq modda
Zichlik
1,87 g/cm3
Erish harorati
296,15 K | 23 °C | 73,4 °F
Qaynash harorati
950,15 K | 677 °C | 1250,6 °F
Eritish issiqligi
2 kJ/mol
Bugʻlanish issiqligi
65 kJ/mol
Solishtirma issiqlik sigʻimi
- J/g·K
Yer po‘stidagi miqdori
Nomaʼlum
Olamdagi miqdori
Nomaʼlum
CAS raqami
7440-73-5
PubChem CID raqami
Nomaʼlum
Atom xususiyatlari
Atom radiusi
260 pm
Kovalentlik radiusi
348 pm
Elektrmanfiylik
0,7 (Poling boʻyicha)
Ionlashish potensiali
4,0727 eV
Molyar hajm
71,07 cm3/mol
Issiqlik oʻtkazuvchanlik
0,15 W/cm·K
Oksidlanish darajasi
1
Qo‘llanilish sohalari
Due to its instability and rarity, there are no commercial applications for francium.
It has been used for research purposes in the fields of biology and of atomic structure.
Its use as a potential diagnostic aid for various cancers has also been explored, but this application has been deemed impractical.
It has been used for research purposes in the fields of biology and of atomic structure.
Its use as a potential diagnostic aid for various cancers has also been explored, but this application has been deemed impractical.
Francium is highly radioactive
Izotoplar
Barqaror izotoplar
-Beqaror izotoplar
199Fr, 200Fr, 201Fr, 202Fr, 203Fr, 204Fr, 205Fr, 206Fr, 207Fr, 208Fr, 209Fr, 210Fr, 211Fr, 212Fr, 213Fr, 214Fr, 215Fr, 216Fr, 217Fr, 218Fr, 219Fr, 220Fr, 221Fr, 222Fr, 223Fr, 224Fr, 225Fr, 226Fr, 227Fr, 228Fr, 229Fr, 230Fr, 231Fr, 232Fr